chore(weekly): add blogpost for 38th week

Fixes packit/agile#1206

Signed-off-by: Matej Focko <mfocko@packit.dev>

Author: mfocko

weekly/2026/week-38.md

@@ -0,0 +1,19 @@
+---
+title: Week 38 in Packit
+date: 2026-09-21
+authors: mfocko
+tags:
+  - 2026-September
+  - 2026
+  - September
+---
+
+## Week 38 (September 15th – September 21st)
+
+- New `skip_install` option for test jobs to omit automatic installation of
+  Copr packages on Testing Farm runner. ([packit#2776](https://github.com/packit/packit/pull/2776))
+- There are also improvements to `/packit help` from an external contributor
+  [@burakeyler](https://github.com/burakeyler). ([packit-service#3186](https://github.com/packit/packit-service/pull/3186))
+- `Status.get_downstream_prs()` now uses `itertools.islice()` to consume only
+  the required number of PRs from the `Iterable` returned
+  by `ForgejoProject.get_pr_list()`, avoiding loading all PRs into memory. ([packit#2771](https://github.com/packit/packit/pull/2771))